131,162 research outputs found
OnlineAppendix_CD-CAT_MCDINA_R2 – Supplemental material for Computerized Adaptive Testing for Cognitively Based Multiple-Choice Data
No full textSupplemental material, OnlineAppendix_CD-CAT_MCDINA_R2 for Computerized Adaptive Testing for Cognitively Based Multiple-Choice Data by Hulya D. Yigit, Miguel A. Sorrel and Jimmy de la Torre in Applied Psychological Measurement</p
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Fetal arterial and venous Doppler in growth restricted fetuses for the prediction of perinatal complications
No full textOzyuncu O, Saygan-Karamursel B, Armangil D, Onderoglu LS, Yigit S, Velipasaoglu M, Deren O. Fetal arterial and venous Doppler in growth restricted fetuses for the prediction of perinatal complications. Turk J Pediatr 2010; 52: 384-392
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Optimal Controller Design for More-Electric Aircraft Power Systems
No full textElectrical energy is becoming more and more popular these days. Because energy efficiency has always been an important aspect for human kind, the vehicles which use energy efficiently are more preferable. The rapid changes in the technology allow us to build more electric systems such as more electric aircraft (MEA). The MEA concept is a major trend in today’s world, but building those vehicles faces some challenges. The subsystems of MEA which consume electricity rather than other energy sources might increase electrical loads of power electronic converters and motor drive systems. Motor drive systems and power electronic systems generally have characteristics of constant power loads (CPL). In small-signal analysis, CPL presents negative impedance that might deteriorate the power system stability margin. This thesis aims to model a typical MEA power system and design an optimal controller which is able to solve the stability issue with CPL. The dynamic model is derived using the equivalent circuit model and linearization around an operating point. This optimal control method provides a solution, which is optimal with respect to a quadratic performance index. MATLAB is used to solve algebraic Riccati equation and obtain figures for the simulation. When it is compared to the effect of conventional power system stabilizers (PSS), the proposed Linear Quadratic Regulator (LQR) gives more robust results. Moreover, the state feedback gain is calculated only for one operating point, but it works over wide range of operating conditions
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Translation of İbrahim Bey's Dasitan-i Yigit Hekayet- introduction-text-review-dictionary-facsimile
No full textSosyal Bilimler Enstitüsü, Türk Dili ve Edebiyatı Ana Bilim Dalı, Yeni Türk Dili Bilim DalıBu çalışmada "D?sit?n-ı Yigit" isimli eser, transkripsiyon harfleriyle günümüz alfabesine aktarılmış ve metnin orijinaline bağlı kalınmıştır. Eser konusu itibariyle bir yiğitlik hikâyesidir. Metin fonetik ve morfolojik bakımdan incelenmiştir. Fonetik olarak vokaller, konsonantlar ve ses değişmelerini; morfolojik olarak ise isim, fiil, sıfat, zamir, zarf, edat, bağlaç, ünlem gibi kelime türlerini ve bunlara gelen ekleri kapsamaktadır. Sözlük ve dizin bölümünde, kelimeler ve onlara gelen ekler alfabetik olarak sıralanmıştır. Kelimelerin anlamları, metindeki kullanımına göre verilmiştir. Çalışma, bu eserin Eski Anadolu Türkçesi dönemine ait bir eser olduğunu, o dönem Türkçesinin özelliklerini taşıdığını, ünlü ve ünsüz uyum ve uyumsuzluklarını göstermiştir. Eserde Türkçe kelimeler yanında, Arapça ve Farsça kelimelerin de kullanılmış olduğunu görmekteyiz. Ancak bu kelimelerin Türkçenin kelime yapısına uydurulmuş olması, onların dilimize yerleşmiş olduğunu da göstermektedir. Bütün bu özellikleri ile yazıldığı dönemin , 14. yüzyılın, dil özelliklerini yansıtmaktadır.In this work, the study whose name is "D?sit?n-i Yigit" was transcribed and adhered to the original text. The story is a valiant story according to its subject. The test was examined from phonetics and morphology. The study includes vocals, consonants and voices changing phonetically and it morphologically includes vocabulary such as noun, verb, adjective, pronoun, adverb, prepositions, conjunction, exclamation and additions to them. In the dictionary and index section, the words and suffixes are listed in alphabetical order. The meanings of the words are given according to their usage. This study was a work belonging to the period of Ancient Anatolian Turkish period and it showed the characteristics of Turkish language at that time, showed vocal and consonant harmony and incompatibility. In addition to Turkish words, we can see that Arabic and Persian words were also used in this study. However, the fact that these words are adapted to the Turkish word structure also indicates that they are settled in our language. It reflects the language properties of 14th century with all these features
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Scholarly Communication and Publishing Lunch and Learn Talk #11: The ULS Open Access Author Fee Fund
No full textAt the May 2014 talk, you will learn about the ULS Open Access Author Fee Fund--what it is, why we do it, how it works, and how the program is going so far
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